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Learn MoreThe goal of this study was to find the longitudinal transcriptional response of Mouse Embryonic Fibroblast (MEF) primary cells during the progression of a cell cycle. Using RNASeq method (single-end 50-bp chemistry on Illumina Hi-seq 2500 instrument in high-throughput mode), we measured the transcriptional response for around two cell-cycles. Using the fold-change (with respect to average response before serum addition at t = 0) time-series data, we first identified, without using a priori knowledge, the duration and timing of cell cycle phases using a change-point detection algorithm. Next, using Least Absolute Shrinkage and Selection Operator (LASSO) and Estimation Stability with Cross Validation (ES-CV), we were able to, without any prior biological knowledge, extract information on the phase-specific causal interaction of cell cycle genes, as well as temporal interdependencies of biological mechanisms through a complete cell cycle. SOURCE: Shankar Subramaniam University of California, San Diego
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